Detailed answer

Lack of sleep can cause dark circles and under-eye bags due to several reasons. When you don't get enough sleep, the blood vessels under your eyes can dilate, causing the appearance of dark circles. Additionally, sleep deprivation can lead to fluid retention and swelling, resulting in under-eye bags. Lack of sleep also affects collagen production, which can make the skin thinner and more prone to dark circles and bags. Proper sleep hygiene and sufficient rest can help minimize these issues.